According to legend, when Dayu was in charge of water control in ancient times, he divided "the world" into Kyushu, so Kyushu became synonymous with the ancient world.
Yuzhou, located in the Central Plains, is the abbreviation of Henan. Henan is the birthplace of Chinese civilization, and Dayu succeeded in harnessing water by relying on the "Luoshu" carried by the Luoshui tortoise in Luoyang, and therefore decided that the world was Kyushu. Therefore, Yuzhou ranked first and deserved it.
Qingzhou, Shandong Peninsula. South of the Yellow River, Mount Tai and its east.
Xuzhou, Hehuai Plain. South of Mount Tai and north of Huaihe River.
Yangzhou, south of Huaihe River, lower reaches of Yangtze River and Lingnan area.
Jingzhou, Hubei Province and the Middle Reaches of the Yangtze River
Liangzhou, Shaanxi, southern foot of Qinling Mountains, Sichuan Basin.
Yongzhou, Gansu, Qinghai, Ningxia, northwestern Inner Mongolia.
Jizhou, Hebei Plain, Shanxi Plateau, Liaohe Plain.
Yanzhou, between the Yellow River and Jishui.
Extended data
Kyushu has a long history. Literally, the word "Zhou" is written as "A" in the inscription, just like the shape of a highland (hill) surrounded by a river. The eleventh sentence of Shuo Wen Jie Zi says: "Water can live in Yuezhou." It can be seen that its original intention is similar to the word "Zhou" of "Island on the River" in The Book of Songs Feng Wang Guanju, which has nothing to do with administrative divisions.
In ancient times, there was abundant precipitation here, and people often lived on high mountains near the water. So "Zhou" became the name of the residential area, so there were such terms as "Zhou Xia", "Rongzhou", "Pingzhou", "Yangzhou", "Guazhou" and "being a state soldier", just like "Shangqiu", "Qiu Yong" and "being a hill soldier".
The word "nine" has two meanings: one is the exact meaning, such as the "nine" of "nine princes in eight years"; First, empty refers to many meanings, such as the "nine" in Jiusan, Jiuchuan, Jiuze, Jiuji and Jiuyuan.
Since "Zhou" is a tiny geographical existence, it is "a vast sea of jade traces painted as Kyushu". And "nine" may be a definite finger, not a virtual finger. Therefore, from the original intention, "Kyushu" refers to the floorboard of nine geographical and cultural divisions, and it is also the floorboard of highlands (hills) surrounded by many rivers; Because of people, it is also extended to the name of "the whole country", and it is still called "the world" and "the four seas".
References:
Baidu Encyclopedia-Kyushu